A straight graduate student goes to the masturbation camp in the mountains held by the "gay masturbation charisma", where all sorts of masturbation techniques are tried out by participants. One day, the student is raped by a gay guy at the camp, and he starts to question his belief in masturbation.
Is The Ultimate Masturbation on Netflix? Unfortunately the movie The Ultimate Masturbation is not yet available on Netflix.
| Directing | Yujiro Koseki | Assistant Director |
| Sound | Hollow Dragon | Music |
| Sound | Daiki Wakabayashi | Sound Effects |
| Editing | Sen Arima | Editor |
| Writing | Kuninori Yamazaki | Screenplay |
| Production | Sachi Hamano | Producer |
| Directing | Kuninori Yamazaki | Director |
| Directing | Dai Ejiri | Other |
| Directing | Masanobu Takeshi | Other |
| Production | Masanobu Takeshi | Production Assistant |
| Camera | Katsuji Oyamada | Director of Photography |
| Lighting | Kenichi Mori | Gaffer |
| Camera | Keiji Sakamoto | Assistant Camera |
| Camera | Osamu Ichikawa | Assistant Camera |
| Lighting | Kyoko Arimasa | Assistant Gaffer |
